<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Feed_Writer
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Entry.php 23775 2011-03-01 17:25:24Z ralph $
 */

/**
 * @see Zend_Feed_Writer_Extension_RendererAbstract
 */
require_once 'Zend/Feed/Writer/Extension/RendererAbstract.php';

/**
 * @category   Zend
 * @package    Zend_Feed_Writer
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Feed_Writer_Extension_ITunes_Renderer_Entry extends Zend_Feed_Writer_Extension_RendererAbstract {
	/**
	 * Set to TRUE if a rendering method actually renders something. This
	 * is used to prevent premature appending of a XML namespace declaration
	 * until an element which requires it is actually appended.
	 *
	 * @var bool
	 */
	protected $_called = false;
	
	/**
	 * Render entry
	 *
	 * @return void
	 */
	public function render() {
		$this->_setAuthors ( $this->_dom, $this->_base );
		$this->_setBlock ( $this->_dom, $this->_base );
		$this->_setDuration ( $this->_dom, $this->_base );
		$this->_setExplicit ( $this->_dom, $this->_base );
		$this->_setKeywords ( $this->_dom, $this->_base );
		$this->_setSubtitle ( $this->_dom, $this->_base );
		$this->_setSummary ( $this->_dom, $this->_base );
		if ($this->_called) {
			$this->_appendNamespaces ();
		}
	}
	
	/**
	 * Append namespaces to entry root
	 *
	 * @return void
	 */
	protected function _appendNamespaces() {
		$this->getRootElement ()->setAttribute ( 'xmlns:itunes', 'http://www.itunes.com/dtds/podcast-1.0.dtd' );
	}
	
	/**
	 * Set entry authors
	 *
	 * @param  DOMDocument $dom
	 * @param  DOMElement $root
	 * @return void
	 */
	protected function _setAuthors(DOMDocument $dom, DOMElement $root) {
		$authors = $this->getDataContainer ()->getItunesAuthors ();
		if (! $authors || empty ( $authors )) {
			return;
		}
		foreach ( $authors as $author ) {
			$el = $dom->createElement ( 'itunes:author' );
			$text = $dom->createTextNode ( $author );
			$el->appendChild ( $text );
			$root->appendChild ( $el );
			$this->_called = true;
		}
	}
	
	/**
	 * Set itunes block
	 *
	 * @param  DOMDocument $dom
	 * @param  DOMElement $root
	 * @return void
	 */
	protected function _setBlock(DOMDocument $dom, DOMElement $root) {
		$block = $this->getDataContainer ()->getItunesBlock ();
		if ($block === null) {
			return;
		}
		$el = $dom->createElement ( 'itunes:block' );
		$text = $dom->createTextNode ( $block );
		$el->appendChild ( $text );
		$root->appendChild ( $el );
		$this->_called = true;
	}
	
	/**
	 * Set entry duration
	 *
	 * @param  DOMDocument $dom
	 * @param  DOMElement $root
	 * @return void
	 */
	protected function _setDuration(DOMDocument $dom, DOMElement $root) {
		$duration = $this->getDataContainer ()->getItunesDuration ();
		if (! $duration) {
			return;
		}
		$el = $dom->createElement ( 'itunes:duration' );
		$text = $dom->createTextNode ( $duration );
		$el->appendChild ( $text );
		$root->appendChild ( $el );
		$this->_called = true;
	}
	
	/**
	 * Set explicit flag
	 *
	 * @param  DOMDocument $dom
	 * @param  DOMElement $root
	 * @return void
	 */
	protected function _setExplicit(DOMDocument $dom, DOMElement $root) {
		$explicit = $this->getDataContainer ()->getItunesExplicit ();
		if ($explicit === null) {
			return;
		}
		$el = $dom->createElement ( 'itunes:explicit' );
		$text = $dom->createTextNode ( $explicit );
		$el->appendChild ( $text );
		$root->appendChild ( $el );
		$this->_called = true;
	}
	
	/**
	 * Set entry keywords
	 *
	 * @param  DOMDocument $dom
	 * @param  DOMElement $root
	 * @return void
	 */
	protected function _setKeywords(DOMDocument $dom, DOMElement $root) {
		$keywords = $this->getDataContainer ()->getItunesKeywords ();
		if (! $keywords || empty ( $keywords )) {
			return;
		}
		$el = $dom->createElement ( 'itunes:keywords' );
		$text = $dom->createTextNode ( implode ( ',', $keywords ) );
		$el->appendChild ( $text );
		$root->appendChild ( $el );
		$this->_called = true;
	}
	
	/**
	 * Set entry subtitle
	 *
	 * @param  DOMDocument $dom
	 * @param  DOMElement $root
	 * @return void
	 */
	protected function _setSubtitle(DOMDocument $dom, DOMElement $root) {
		$subtitle = $this->getDataContainer ()->getItunesSubtitle ();
		if (! $subtitle) {
			return;
		}
		$el = $dom->createElement ( 'itunes:subtitle' );
		$text = $dom->createTextNode ( $subtitle );
		$el->appendChild ( $text );
		$root->appendChild ( $el );
		$this->_called = true;
	}
	
	/**
	 * Set entry summary
	 *
	 * @param  DOMDocument $dom
	 * @param  DOMElement $root
	 * @return void
	 */
	protected function _setSummary(DOMDocument $dom, DOMElement $root) {
		$summary = $this->getDataContainer ()->getItunesSummary ();
		if (! $summary) {
			return;
		}
		$el = $dom->createElement ( 'itunes:summary' );
		$text = $dom->createTextNode ( $summary );
		$el->appendChild ( $text );
		$root->appendChild ( $el );
		$this->_called = true;
	}
}
